Hi I am only 11 so I don't under stand hi tech talk like USB or hdcs and all that and I really need help my dell laptop says it has limited connectivity I need this computer to work because its my school one and I can't afford a new one please help!

If you don't understand those terms then you likely won't be able to follow online instructions. Best to get a tech savvy person to look at it.

NeedKarma is correct. Your best bet is to talk to the person who setup your network.